New

New

Year 5

# Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication

I can use expanded and short multiplication to multiply 2-digit by 1-digit numbers.

Share activities with pupils

Share function coming soon...

New

New

Year 5

# Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication

I can use expanded and short multiplication to multiply 2-digit by 1-digit numbers.

Share activities with pupils

Share function coming soon...

## Slide deck

Download slide deck

## Lesson details

### Key learning points

- Use times tables and place value to estimate the product of a 2-digit by a 1-digit multiplication.
- Use expanded short multiplication to multiply a 2-digit by a 1-digit number.
- Use short multiplication to multiply a 2-digit by a 1-digit number.

### Common misconception

Pupils may find it difficult to identify the multiples of 10 a number is between when estimating.

Provide a number line and continue to use stem sentences to support pupils in their thinking.

### Keywords

Estimation - To find a value that is close enough to the right answer, usually with some thought or calculation involved is known as estimation.

Estimation is a key skill and should be modelled clearly, with pupils encouraged to use estimation at every opportunity. Take time to model your 'thinking aloud' process while estimating.

Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

Loading...

## Worksheet

Download worksheet

## Starter quiz

Download starter quiz

### 6 Questions

Q1.

483 can be partitioned as __________.

4 tens, 8 tens and 3 ones.

4 hundreds, 7 tens and 3 ones.

4 hundreds, 80 tens and 3 ones.

Q2.

Izzy is chanting her 7 times tables: ... 21, 28, 35, ___. What comes next?

40

41

43

Q3.

Izzy is chanting her 7 times tables in descending order: ... 77, 70, 63, . What comes next?

Q4.

Use short multiplication to calculate this question: 56 × 3 =

Q5.

Use expanded multiplication to calculate this question: 74 × 5=

Q6.

Sam has 71 shiny cards, Izzy has 213 shiny cards. Izzy has times as many.

## Exit quiz

Download exit quiz

### 6 Questions

Q1.

To estimate for the calculation: 4 × 72, 72 is between __________.

60 and 70

65 and 70

Q2.

Select the correct number to complete the estimation.

28

74

208

Q3.

Write the correct number to complete the estimation.

Q4.

Select an appropriate estimation for 63 × 3

65 × 3

70 × 3

6 × 3

Q5.

Use estimation to decide which has a suitable answer for this multiplication: 46 × 3

B

Q6.

Solve the worded problem using short multiplication: In one month 34 cups of lemonade are sold. The following month, six times as many are sold. How many cups of lemonade were sold that month?